TDA2005 20 W bridge/stereo amplifier for car radio Datasheet production data Features High output power: P o = 10 + 10 W @ R L = 2 Ω, THD = 10 % P o = 20 W @ R L = 4 Ω, THD = 10 %. Protection against: Output DC and AC short circuit to ground Overrating chip temperature Load dump voltage surge Fortuitous open ground Very inductive loads Loudspeaker protection during short circuit for one wire to ground Description The TDA2005 is a class B dual audio power amplifier in Multiwatt11 package specifically designed for car radio applications. Multiwatt11 Power booster amplifiers can be easily designed using this device that provides a high current capability (up to 3.5 A) and can drive very low impedance loads (down to 1.6 Ω in stereo applications) obtaining an output power of more than 20 W (bridge configuration). Table 1. Device summary Order code Package Packing TDA2005R Multiwatt11 Tube May 2012 Doc ID 1451 Rev 5 1/25 This is information on a product in full production. www.st.com 1
Contents TDA2005 Contents 1 Schematic and pins connection diagrams....................... 5 2 Electrical specifications...................................... 6 2.1 Absolute maximum ratings..................................... 6 2.2 Thermal data............................................... 6 2.3 Bridge amplifier section....................................... 6 2.3.1 Electrical characteristics (bridge application)...................... 7 2.3.2 Bridge amplifier design...................................... 9 2.4 Stereo amplifier application................................... 10 2.4.1 Electrical characteristics (stereo application)..................... 11 3 Application suggestion...................................... 15 4 Application information..................................... 16 4.1 Built-in protection systems.................................... 20 4.1.1 Load dump voltage surge................................... 20 4.1.2 Short circuit (AC and DC conditions)........................... 21 4.1.3 Polarity inversion.......................................... 21 4.1.4 Open ground............................................. 21 4.1.5 Inductive load............................................. 21 4.1.6 DC voltage............................................... 21 4.1.7 Thermal shut-down........................................ 22 4.1.8 Loudspeaker protection..................................... 22 5 Package information........................................ 23 6 Revision history........................................... 24 2/25 Doc ID 1451 Rev 5
TDA2005 List of tables List of tables Table 1. Device summary.......................................................... 1 Table 2. Absolute maximum ratings.................................................. 6 Table 3. Thermal data............................................................. 6 Table 4. Electrical characteristics (bridge application).................................... 7 Table 5. Bridge amplifier design..................................................... 9 Table 6. High gain vs. Rx......................................................... 10 Table 7. Electrical characteristics (stereo application)................................... 11 Table 8. Recommended values of the component of the bridge application circuit............. 15 Table 9. Document revision history................................................. 24 Doc ID 1451 Rev 5 3/25
List of figures TDA2005 List of figures Figure 1. Schematic diagram........................................................ 5 Figure 2. Pins connection diagram (top view)........................................... 5 Figure 3. Test and application circuit (bridge amplifier).................................... 6 Figure 4. PC board and components layout of Figure 3................................... 7 Figure 5. Output offset voltage vs. supply voltage........................................ 8 Figure 6. Distortion vs. output power (R L =4Ω)......................................... 8 Figure 7. Distortion vs. output power (R L =3.2 Ω)........................................ 8 Figure 8. Bridge configuration...................................................... 10 Figure 9. Typical stereo application circuit............................................. 10 Figure 10. Quiescent output voltage vs. supply voltage (stereo amplifier)...................... 12 Figure 11. Quiescent drain current vs. supply voltage (stereo amplifier)....................... 12 Figure 12. Distortion vs. output power (stereo amplifier)................................... 12 Figure 13. Output power vs. supply voltage, R L = 2 and 4 Ω (stereo amplifier).................. 12 Figure 14. Output power vs. supply voltage, R L = 1.6 and 3.2 Ω (stereo amplifier)............... 13 Figure 15. Distortion vs. frequency, R L = 2 and 4 Ω (stereo amplifier)........................ 13 Figure 16. Distortion vs. frequency, R L = 1.6 and 3.2 Ω (stereo amplifier)..................... 13 Figure 17. Supply voltage rejection vs. C3 (stereo amplifier)................................ 13 Figure 18. Supply voltage rejection vs. frequency (stereo amplifier).......................... 13 Figure 19. Supply voltage rejection vs. C2 and C3, G V = 390/1 Ω (stereo amplifier)............. 13 Figure 20. Supply voltage rejection vs. C2 and C3, G V = 1000/10 Ω (stereo amplifier)........... 14 Figure 21. Gain vs. input sensitivity R L = 4 Ω (stereo amplifier)............................. 14 Figure 22. Gain vs. input sensitivity R L = 2 Ω (stereo amplifier)............................. 14 Figure 23. Total power dissipation and efficiency vs. output power (bridge).................... 14 Figure 24. Total power dissipation and efficiency vs. output power (stereo).................... 14 Figure 25. Bridge amplifier without boostrap............................................ 16 Figure 26. PC board and components layout of Figure 25................................. 16 Figure 27. Low cost bridge amplifier (GV = 42 db)....................................... 17 Figure 28. PC board and components layout of Figure 27................................. 17 Figure 29. 10 + 10 W stereo amplifier with tone balance and loudness control.................. 18 Figure 30. Tone control response (circuit of Figure 29).................................... 18 Figure 31. 20 W bus amplifier....................................................... 19 Figure 32. Simple 20 W two way amplifier (FC = 2 khz)................................... 19 Figure 33. Bridge amplifier circuit suited for low-gain applications (GV = 34 db)................ 20 Figure 34. Example of muting circuit.................................................. 20 Figure 35. Suggested LC network circuit............................................... 21 Figure 36. Voltage gain bridge configuration............................................ 21 Figure 37. Maximum allowable power dissipation vs. ambient temperature.................... 22 Figure 38. Output power and drain current vs. case temperature (R L = 4 Ω)................... 22 Figure 39. Output power and drain current vs. case temperature (R L = 3.2 Ω).................. 22 Figure 40. Multiwatt11 mechanical data and package dimensions........................... 23 4/25 Doc ID 1451 Rev 5
TDA2005 Schematic and pins connection diagrams 1 Schematic and pins connection diagrams Figure 1. Schematic diagram Figure 2. Pins connection diagram (top view) Doc ID 1451 Rev 5 5/25
Electrical specifications TDA2005 2 Electrical specifications 2.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit V S DC supply voltage 28 V Peak supply voltage (50 ms) 40 Operating supply voltage 18 Io (1) Output peak current (non repetitive t = 0.1 ms) 4.5 Output peak current (repetitive f 10 Hz) 3.5 A P tot Power dissipation at T case = 60 C 20 W T stg, T j Storage and junction temperature -40 to 150 C 1. The max. output current is internally limited. 2.2 Thermal data Table 3. Thermal data Symbol Parameter Value Unit R th-j-case Thermal resistance junction-to-case max 3 C/W 2.3 Bridge amplifier section Figure 3. Test and application circuit (bridge amplifier) 6/25 Doc ID 1451 Rev 5
TDA2005 Electrical specifications Figure 4. PC board and components layout of Figure 3 2.3.1 Electrical characteristics (bridge application) Table 4. Refer to the bridge application circuit T amb = 25 C; Gv = 50dB; R th(heatsink) = 4 C/W unless otherwise specified. Electrical characteristics (bridge application) Symbol Parameter Test condition Min. Typ. Max. Unit V S Supply voltage - 8-18 V V os I d P o THD V i Output offset voltage (between pin 8 and pin 10) Total quiescent drain current Output power Total harmonic distortion Input sensitivity V S = 14.4 V V S = 13.2 V V S = 14.4 V; R L = 4 Ω V S = 13.2 V; R L = 3.2 Ω f = 1 khz, THD = 10 % V S = 14.4 V; R L = 4 Ω V S = 14.4 V; R L = 3.2 Ω V S = 13.2 V; R L = 3.2 Ω f = 1 khz; V S = 14.4 V; R L = 4 Ω; P o = 50 mw to 15 W; f = 1 khz; V S = 13.2 V; R L = 3.2 Ω; P o = 50m W to 13 W; f = 1 khz R L = 4 Ω; P o = 2 W; R L = 3.2 Ω; P o = 2 W - - - 18 20 17 75 70 20 22 19 150 150 150 150 mv mv ma ma - W - - 1 % - - 1 % - 9 8 - mw R i Input resistance f = 1 khz 70 - - kω f L Low frequency roll off (-3 db) R L = 3.2 Ω - - 40 Hz f H High frequency roll off (-3 db) R L = 3.2 Ω 20 - - KHz Gv Closed loop voltage gain f = 1 khz - 50 - db e N Total Input noise voltage R g = 10 Ω (1) - 3 10 μv SVR Supply voltage rejection V ripple = 0.5 V; f ripple =100 Hz R g = 10 kω; C 4 = 10 μf 45 55 - db Doc ID 1451 Rev 5 7/25
Electrical specifications TDA2005 Table 4. η SVR T j V OSH Electrical characteristics (bridge application) (continued) Symbol Parameter Test condition Min. Typ. Max. Unit Efficiency Supply voltage rejection Thermal shut-down junction temperature Output voltage with one side of the speaker shorted to ground 1. Bandwidth filter: 22 Hz to 22 khz. f = 1 khz; V S = 14.4 V; R L = 4 Ω; P o = 20 W; R L = 3.2 Ω; P o = 22 W f = 1 khz; V S = 13.2 V; R L = 3.2 Ω; P o = 19 W f = 100 Hz; V ripple = 0.5 V; R g = 10 kω; R L = 4 Ω f = 1 khz; V S = 14.4V; R L = 4 Ω; P tot = 13 W V S = 14.4 V; R L = 4 Ω V S = 13.2 V; R L = 3.2 Ω - 60 60-58 - - % 30 36 - db - 145 - C - - 2 V Figure 5. Output offset voltage vs. supply voltage Figure 6. Distortion vs. output power (R L =4Ω) Figure 7. Distortion vs. output power (R L =3.2 Ω) 8/25 Doc ID 1451 Rev 5
TDA2005 Electrical specifications 2.3.2 Bridge amplifier design The following considerations can be useful when designing a bridge amplifier. Table 5. Bridge amplifier design Parameter Single ended Bridge V o max Peak output voltage (before clipping) 1 -- ( V 2 s 2V CEsat ) V s 2V CEsat I o max Peak Output current (before clipping) 1 -- V s 2V ----------------------------------- CEsat 2 R L V s 2V ----------------------------------- CEsat R L P o max RMS output power (before clipping) 1( -- V s 2V CEsat ) 2 ------------------------------------------ 4 2R L ( V s 2V CEsat ) 2 ------------------------------------------ 2R L Where: V CE sat = output transistors saturation voltage V S = allowable supply voltage R L = load impedance Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In other words, with the same R L the bridge configuration can deliver an output power that is four times the output power of a single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power that is four times the output power of a single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power that is twice the output power of a single ended amplifier. Core must be taken when selecting V S and R L in order to avoid an output peak current above the absolute maximum rating. From the expression for I Omax, assuming V S = 14.4 V and V CE sat = 2 V, the minimum load that can be driven by TDA2005 in bridge configuration is: V R s 2V CEsat Lmin = ----------------------------------- = 14.4 -------------------- 4 = 2.97Ω I Omax 3.5 The voltage gain of the bridge configuration is given by (see Figure 36): V G 0 R v ------ 1 1 R = = + -------------------------- + ------ 3 V 1 R 2 R -------------------- 4 R 4 R 2 + R 4 Doc ID 1451 Rev 5 9/25
Electrical specifications TDA2005 For sufficiently high gains (40 to 50 db) it is possible to put R 2 = R 4 and R 3 = 2R 1, simplifying the formula in: Table 6. High gain vs. Rx G v 4 R 1 = ------ R 2 G v (db) R 1 (Ω) R 2 = R 4 (Ω) R 3 (Ω) 40 1000 39 2000 50 1000 12 2000 Figure 8. Bridge configuration 2.4 Stereo amplifier application Figure 9. Typical stereo application circuit 10/25 Doc ID 1451 Rev 5
TDA2005 Electrical specifications 2.4.1 Electrical characteristics (stereo application) Table 7. Refer to the stereo application circuit T amb = 25 C; G v = 50 db; R th(heatsink) = 4 C/W unless otherwise specified Electrical characteristics (stereo application) Symbol Parameter Test condition Min. Typ. Max. Unit V S Supply voltage 8 18 V V o Quiescent offset voltage V S = 14.4 V V S = 13.2 V 6.6 6 7.2 6.6 7.8 7.2 V V I d Total quiescent drain current V S = 14.4 V V S = 13.2 V - 65 62 120 120 ma ma P o Output power (each channel) f = 1 khz; THD = 10 % V S = 14.4 V; R L = 4 Ω V S = 14.4 V; R L = 3.2 Ω V S = 14.4 V; R L = 2 Ω V S = 14.4 V; R L = 1.6 Ω f = 1 khz; THD = 10 % V S = 13.2 V; R L =3.2 Ω V S = 13.2 V; R L = 1.6 Ω 6 7 9 10 6 9 6.5 8 10 11 6.5 10 - W - W THD CT Total harmonic distortion Cross talk V S = 16 V; R L = 2 Ω f = 1 khz; V S = 14.4 V; R L = 4 Ω; P o = 50 mw to 4 W; f = 1 khz; V S = 14.4 V; R L = 2 Ω; P o = 50 mw to 6 W; f = 1 khz; V S = 13.2 V; R L = 3.2 Ω; P o = 50 mw to 3W; f = 1KHz; V S = 13.2V; R L = 1.6Ω; P o = 40mW to 6W; V S = 14.4 V; V o = 4 V RMS ; R g = 5 kω; R L = 4 Ω; f = 1 khz f = 10 khz - - - - - 12 0.2 0.3 0.2 0.3 60 45 1 % 1 % 1 % 1 % V i Input saturation voltage - 300 - mw V i Input sensitivity f = 1 khz; Po = 1W; R L = 4 Ω; R L = 3.2Ω; - 6 5.5 - mw mw - mv mv R i Input resistance f = 1 khz 70 200 - kω f L Low frequency roll off (-3 db) R L = 2 Ω - - 50 Hz f H High frequency roll off (-3 db) R L = 2 Ω 15 - - khz Open loop voltage gain f = 1 khz - 90 - G v db Closed loop voltage gain f = 1 khz 48 50 51 Doc ID 1451 Rev 5 11/25
Electrical specifications TDA2005 Table 7. Electrical characteristics (stereo application) (continued) Symbol Parameter Test condition Min. Typ. Max. Unit ΔGv Closed loop gain matching - - 0.5 - db e N Total input noise voltage R g = 10 kω (1) - 1.5 5 μv SVR Supply voltage rejection V ripple = 0.5 V; f ripple =100 Hz R g = 10 kω; C 3 = 10 μf; 35 45 - db η Efficiency f = 1 khz; V S = 14.4 V; R L = 4 Ω; P o = 6.5 W; R L = 2Ω; P o = 10 W; f = 1 khz; V S = 13.2 V; R L = 3.2 Ω; P o = 6.5 W; R L = 1.6 Ω; P o = 100 W; - 70 60-70 60 - % - % 1. Bandwidth filter: 22 Hz to 22 khz. Figure 10. Quiescent output voltage vs. supply voltage (stereo amplifier) Figure 11. Quiescent drain current vs. supply voltage (stereo amplifier) Figure 12. Distortion vs. output power (stereo amplifier) Figure 13. Output power vs. supply voltage, R L = 2 and 4 Ω (stereo amplifier) 12/25 Doc ID 1451 Rev 5
TDA2005 Electrical specifications Figure 14. Output power vs. supply voltage, R L = 1.6 and 3.2 Ω (stereo amplifier) Figure 15. Distortion vs. frequency, R L = 2 and 4 Ω (stereo amplifier) Figure 16. Distortion vs. frequency, R L = 1.6 and 3.2 Ω (stereo amplifier) Figure 17. Supply voltage rejection vs. C3 (stereo amplifier) Figure 18. Supply voltage rejection vs. frequency (stereo amplifier) Figure 19. Supply voltage rejection vs. C2 and C3, G V = 390/1 Ω (stereo amplifier) Doc ID 1451 Rev 5 13/25
Electrical specifications TDA2005 Figure 20. Supply voltage rejection vs. C2 and C3, G V = 1000/10 Ω (stereo amplifier) Figure 21. Gain vs. input sensitivity R L = 4 Ω (stereo amplifier) Figure 22. Gain vs. input sensitivity R L = 2 Ω (stereo amplifier) Figure 23. Total power dissipation and efficiency vs. output power (bridge) Figure 24. Total power dissipation and efficiency vs. output power (stereo) 14/25 Doc ID 1451 Rev 5
TDA2005 Application suggestion 3 Application suggestion Table 8. Component The recommended values of the components are those shown on bridge application circuit of Figure 3. Different values can be used; the following table can help the designer. Recommended values of the component of the bridge application circuit Recommended value Purpose Larger than Smaller than r C1 2.2 μf Input DC decoupling - - C2 2.2 μf Optimization of turn on Pop and turn on Delay High turn on delay High Turn on Pop, Higher low frequency cutoff Increase of Noise C3 0.1 μf Supply bypass - Danger of oscillation C4 10 μf Ripple rejection C5, C7 100 μf Bootstrapping - C6, C8 220 μf Feedback input DC decoupling, low frequency cut-off Increase of SVR, Increase of the Switchon Time - Degradation of SVR Increase of distortion at low frequency Danger of oscillation at high frequencies with inductive loads C9, C10 0.1 μf Frequency stability - Danger of oscillation R1 120 kω Optimization of the output symmetry Smaller P omax R2 1 kω - - - R3 2 kω - - - R4, R5 12 Ω Closed loop gain setting (see Bridge Amplifier Design (1) ) R6, R7 1 Ω Frequency stability 1. The closed loop gain must be higher than 32 db. - - Danger of oscillation at high frequencies with inductive loads Smaller P omax - Doc ID 1451 Rev 5 15/25
Application information TDA2005 4 Application information Figure 25. Bridge amplifier without boostrap Figure 26. PC board and components layout of Figure 25 16/25 Doc ID 1451 Rev 5
TDA2005 Application information Figure 27. Low cost bridge amplifier (G V = 42 db) Figure 28. PC board and components layout of Figure 27 Doc ID 1451 Rev 5 17/25
Application information TDA2005 Figure 29. 10 + 10 W stereo amplifier with tone balance and loudness control Figure 30. Tone control response (circuit of Figure 29) 18/25 Doc ID 1451 Rev 5
TDA2005 Application information Figure 31. 20 W bus amplifier Figure 32. Simple 20 W two way amplifier (F C = 2 khz) Doc ID 1451 Rev 5 19/25
Application information TDA2005 Figure 33. Bridge amplifier circuit suited for low-gain applications (G V = 34 db) Figure 34. Example of muting circuit 4.1 Built-in protection systems 4.1.1 Load dump voltage surge The TDA2005 has a circuit which enables it to withstand voltage pulse train, on Pin 9, of the type shown in Figure 36. If the supply voltage peaks to more than 40 V, then an LC filter must be inserted between the supply and pin 9, in order to assure that the pulses at pin 9 will be held within the limits shown. A suggested LC network is shown in Figure 35. With this network, a train of pulses with amplitude up to 120 V and width of 2 ms can be applied at point A. This type of protection is ON when the supply voltage (pulse or DC) exceeds 18 V. For this reason the maximum operating supply voltage is 18 V. 20/25 Doc ID 1451 Rev 5
TDA2005 Application information Figure 35. Suggested LC network circuit Figure 36. Voltage gain bridge configuration 4.1.2 Short circuit (AC and DC conditions) The TDA2005 can withstand a permanent short-circuit on the output for a supply voltage up to 16 V. 4.1.3 Polarity inversion High current (up to 10 A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 2 A fuse (normally connected in series with the supply). This feature is added to avoid destruction, if during fitting to the car, a mistake on the connection of the supply is made. 4.1.4 Open ground When the ratio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the TDA2005 protection diodes are included to avoid any damage. 4.1.5 Inductive load A protection diode is provided to allow use of the TDA2005 with inductive loads. 4.1.6 DC voltage The maximum operating DC voltage for the TDA2005 is 18 V. However the device can withstand a DC voltage up to 28 V with no damage. This could occur during winter if two batteries are series connected to crank the engine. Doc ID 1451 Rev 5 21/25
Application information TDA2005 4.1.7 Thermal shut-down The presence of a thermal limiting circuit offers the following advantages: 1. an overload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood. 2. the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature : all that happens is that P o (and therefore P tot ) and Id are reduced. The maximum allowable power dissipation depends upon the size of the external heatsink (i.e. its thermal resistance); Figure 37 shows the power dissipation as a function of ambient temperature for different thermal resistance. 4.1.8 Loudspeaker protection The circuit offers loudspeaker protection during short circuit for one wire to ground. Figure 37. Maximum allowable power dissipation vs. ambient temperature Figure 38. Output power and drain current vs. case temperature (R L = 4 Ω) Figure 39. Output power and drain current vs. case temperature (R L = 3.2 Ω) 22/25 Doc ID 1451 Rev 5
TDA2005 Package information 5 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. Figure 40. Multiwatt11 mechanical data and package dimensions Doc ID 1451 Rev 5 23/25
Revision history TDA2005 6 Revision history Table 9. Document revision history Date Revision Changes 09-Jun-1998 1 Initial release. 20-May-2000 2 Update logo. 10-Sep-2003 3 Update package drawing. 28-Jan-2010 4 Document reformatted. Updated Features, Description and Table 1: Device summary in cover page. 02-May-2012 5 Updated Table 1: Device summary on page 1. 24/25 Doc ID 1451 Rev 5
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